I have the good fortune of owning 2 different T5 trannys. Now I need to pick which one to use.

I have a 1993 WC T5 with a 3.97 1st gear and a 0.72 5th gear. My rear is a 3.73. My 2nd T5 is from a Camaro and has the 2.95 1st gear and a 0.63 5th gear.

I ran some calculations online trying to figure out the final RPMs for my 250ci while cruising at 70mph. The 0.72 OD tranny calculates to just about 2200rpms at 70mph. The 0.63 gives just under 2000rpms at 70mph.

I don't want my engine to bog down on the freeway if I come to a hill.

The Camaro 0.62 OD gear has me a bit worried. Maybe I shouldn't be because the 88 Camaro that the T5 came out of had a 3.08 rear or a 3.42 rear but had a 26" tall tire. I will probably have a 29" tall tire.

Any suggestions? I already know that the 3.97 1st gear will make that first shift fairly quick.

1965 Chevy C10 Shortbed 1/2-Ton Stepside
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